Explain the structure of diamond giving the reason for its harness as well as non conductivity of electricity.

Explain the structure of graphite giving the reason for its softness as well as its electrical conductivity.

Graphite is a good conductor of electricity. Give reason.

Draw the structure of a neuron and explain its function

Draw the structure of a neuron and explain its function

Draw the structure of neuron and explain its function.

Which of the following complexes is non-conducting electricity?

Explain the structure and function of seed parts with the help of well labelled diagram.

Give reason : (i) Ionic compounds in solid state do not conduct electricity, whereas in molten state are good conductors of electricity. (ii) Silver articles when exposed to air gradually turn blackish. (iii) Chemical reaction does not take place when copper is added to iron sulphate solution.